How to use the pydocstyle.checker function in pydocstyle

elif settings.get('select'):
        args.append('--select=' + ','.join(settings['select']))
    elif settings.get('ignore'):
        args.append('--ignore=' + ','.join(settings['ignore']))

    log.info("Using pydocstyle args: %s", args)

    conf = pydocstyle.config.ConfigurationParser()
    with _patch_sys_argv(args):
        # TODO(gatesn): We can add more pydocstyle args here from our pyls config
        conf.parse()

    # Will only yield a single filename, the document path
    diags = []
    for filename, checked_codes, ignore_decorators in conf.get_files_to_check():
        errors = pydocstyle.checker.ConventionChecker().check_source(
            document.source, filename, ignore_decorators=ignore_decorators
        )

        try:
            for error in errors:
                if error.code not in checked_codes:
                    continue
                diags.append(_parse_diagnostic(document, error))
        except pydocstyle.parser.ParseError:
            # In the case we cannot parse the Python file, just continue
            pass

    log.debug("Got pydocstyle errors: %s", diags)
    return diags

elif settings.get("select"):
        args.append("--select=" + ",".join(settings["select"]))
    elif settings.get("ignore"):
        args.append("--ignore=" + ",".join(settings["ignore"]))

    log.info("Using pydocstyle args: %s", args)

    conf = pydocstyle.config.ConfigurationParser()
    with _patch_sys_argv(args):
        # TODO(gatesn): We can add more pydocstyle args here from our pyls config
        conf.parse()

    # Will only yield a single filename, the document path
    diags = []
    for filename, checked_codes, ignore_decorators in conf.get_files_to_check():
        errors = pydocstyle.checker.ConventionChecker().check_source(
            document.source, filename, ignore_decorators=ignore_decorators
        )

        try:
            for error in errors:
                if error.code not in checked_codes:
                    continue
                diags.append(_parse_diagnostic(document, error))
        except pydocstyle.parser.ParseError:
            # In the case we cannot parse the Python file, just continue
            pass

    log.debug("Got pydocstyle errors: %s", diags)
    return diags